Mn3O4-Graphene Hybrid as a High-Capacity Anode Material for Lithium Ion Batteries
Mn3O4-Graphene Hybrid as a High-Capacity Anode Material for Lithium Ion Batteries
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DOI：
10.1021/ja105296a
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发表时间：
2010-10-13
影响因子：
15
通讯作者：
Dai, Hongjie
中科院分区：
文献类型：
--
作者：
Wang, Hailiang;Cui, Li-Feng;Dai, Hongjie
我们开发了两步溶液相反应以在还原氧化石墨烯（RGO）片上形成用于锂离子电池应用的Mn 3 O 4纳米颗粒的杂化材料。与溶液中的自由颗粒生长相反，Mn 3 O 4纳米颗粒在RGO片上的选择性生长允许电绝缘Mn 3 O 4纳米颗粒通过下面的导电石墨烯网络连接到集电器。在RGO上形成的Mn 3 O 4纳米颗粒显示出高达900 mAh/g的高比容量，接近其理论容量，具有良好的倍率性能和循环稳定性，这是由于石墨烯基底和顶部生长的Mn 3 O 4纳米颗粒之间的密切相互作用。Mn 3 O 4/RGO杂化材料有望成为高容量、低成本、环境友好的锂离子电池负极材料。我们的石墨烯生长方法应该为基于高绝缘材料的电池电极的设计和合成提供一种新技术。
We developed two-step solution-phase reactions to form hybrid materials of Mn3O4 nanoparticles on reduced graphene oxide (RGO) sheets for lithium ion battery applications. Selective growth of Mn3O4 nanoparticles on RGO sheets, in contrast to free particle growth in solution, allowed for the electrically insulating Mn3O4 nanoparticles to be wired up to a current collector through the underlying conducting graphene network. The Mn3O4 nanoparticles formed on RGO show a high specific capacity up to similar to 900 mAh/g, near their theoretical capacity, with good rate capability and cycling stability, owing to the intimate interactions between the graphene substrates and the Mn3O4 nanoparticles grown atop. The Mn3O4/RGO hybrid could be a promising candidate material for a high-capacity, low-cost, and environmentally friendly anode for lithium ion batteries. Our growth-on-graphene approach should offer a new technique for the design and synthesis of battery electrodes based on highly insulating materials.